There was thunder in the air on the night I went to the deserted mansion atop Tempest Mountain to find the lurking fear. I was not alone, for foolhardiness was not then mixed with that love of the grotesque and the terrible which has made my career a series of quests for strange horrors in literature and in life. With me were two faithful and muscular men for whom I had sent when the time came; men long a**ociated with me in my ghastly explorations because of their peculiar fitness. We had started quietly from the village because of the reporters who still lingered about after the Eldritch panic of a month before — the nightmare creeping d**h. Later, I thought, they might aid me; but I did not want them then. Would to God I had let them share the search, that I might not have had to bear the secret alone so long; to bear it alone for fear the world would call me mad or go mad itself at the daemon implications of the thing. Now that I am telling it anyway, lest the brooding make me a maniac, I wish I had never concealed it. For I, and I only, know what manner of fear lurked on that spectral and desolate mountain. In a small motor-car we covered the miles of primeval forest and hill until the wooded ascent checked it. The country bore an aspect more than usually sinister as we viewed it by night and without the accustomed crowds of investigators, so that we were often tempted to use the acetylene headlight despite the attention it might attract. It was not a wholesome landscape after dark, and I believe I would have noticed its morbidity even had I been ignorant of the terror that stalked there. Of wild creatures there were none—they are wise when d**h leers close. The ancient lightning-scarred trees seemed unnaturally large and twisted, and the other vegetation unnaturally thick and feverish, while curious mounds and hummocks in the weedy, fulgurite-pitted earth reminded me of snakes and dead men's skulls swelled to gigantic proportions. Fear had lurked on Tempest Mountain for more than a century. This I learned at once from newspaper accounts of the catastrophe which first brought the region to the world's notice. The place is a remote, lonely elevation in that part of the Catsk**s where Dutch civilisation once feebly and transiently penetrated, leaving behind as it receded only a few ruined mansions and a degenerate squatter population inhabiting pitiful hamlets on isolated slopes. Normal beings seldom visited the locality till the state police were formed, and even now only infrequent troopers patrol it. The fear, however, is an old tradition throughout the neighbouring villages; since it is a prime topic in the simple discourse of the poor mongrels who sometimes leave their valleys to trade hand-woven baskets for such primitive necessities as they cannot shoot, raise, or make. The lurking fear dwelt in the shunned and deserted Martense mansion, which crowned the high but gradual eminence whose liability to frequent thunderstorms gave it the name of Tempest Mountain. For over a hundred years the antique, grove-circled stone house had been the subject of stories incredibly wild and monstrously hideous; stories of a silent colossal creeping d**h which stalked abroad in summer. With whimpering insistence the squatters told tales of a daemon which seized lone wayfarers after dark, either carrying them off or leaving them in a frightful state of gnawed dismemberment; while sometimes they whispered of blood-trails toward the distant mansion. Some said the thunder called the lurking fear out of its habitation, while others said the thunder was its voice. No one outside the backwoods had believed these varying and conflicting stories, with their incoherent, extravagant descriptions of the half-glimpsed fiend; yet not a farmer or villager doubted that the Martense mansion was ghoulishly haunted. Local history forbade such a doubt, although no ghostly evidence was ever found by such investigators as had visited the building after some especially vivid tale of the squatters. Grandmothers told strange myths of the Martense spectre; myths concerning the Martense family itself, its queer hereditary dissimilarity of eyes, its long, unnatural annals, and the murder which had cursed it. The terror which brought me to the scene was a sudden and portentous confirmation of the mountaineers' wildest legends. One summer night, after a thunderstorm of unprecedented violence, the countryside was aroused by a squatter stampede which no mere delusion could create. The pitiful throngs of natives shrieked and whined of the unnamable horror which had descended upon them, and they were not doubted. They had not seen it, but had heard such cries from one of their hamlets that they knew a creeping d**h had come. In the morning citizens and state troopers followed the shuddering mountaineers to the place where they said the d**h had come. d**h was indeed there. The ground under one of the squatters' villages had caved in after a lightning stroke, destroying several of the malodorous shanties; but upon this property damage was superimposed an organic devastation which paled it to insignificance. Of a possible 75 natives who had inhabited this spot, not one living specimen was visible. The disordered earth was covered with blood and human debris bespeaking too vividly the ravages of daemon teeth and talons; yet no visible trail led away from the carnage. That some hideous animal must be the cause, everyone quickly agreed; nor did any tongue now revive the charge that such cryptic d**hs formed merely the sordid murders common in decadent communities. That charge was revived only when about 25 of the estimated population were found missing from the dead; and even then it was hard to explain the murder of fifty by half that number. But the fact remained that on a summer night a bolt had come out of the heavens and left a dead village whose corpses were horribly mangled, chewed, and clawed. The excited countryside immediately connected the horror with the haunted Martense mansion, though the localities were over three miles apart. The troopers were more sceptical; including the mansion only casually in their investigations, and dropping it altogether when they found it thoroughly deserted. Country and village people, however, canva**ed the place with infinite care; overturning everything in the house, sounding ponds and brooks, beating down bushes, and ransacking the nearby forests. All was in vain; the d**h that had come had left no trace save destruction itself. By the second day of the search the affair was fully treated by the newspapers, whose reporters overran Tempest Mountain. They described it in much detail, and with many interviews to elucidate the horror's history as told by local grandams. I followed the accounts languidly at first, for I am a connoisseur in horrors; but after a week I detected an atmosphere which stirred me oddly, so that on August 5th, 1921, I registered among the reporters who crowded the hotel at Lefferts Corners, nearest village to Tempest Mountain and acknowledged headquarters of the searchers. Three weeks more, and the dispersal of the reporters left me free to begin a terrible exploration based on the minute inquiries and surveying with which I had meanwhile busied myself. So on this summer night, while distant thunder rumbled, I left a silent motor-car and tramped with two armed companions up the last mound-covered reaches of Tempest Mountain, casting the beams of an electric torch on the spectral grey walls that began to appear through giant oaks ahead. In this morbid night solitude and feeble shifting illumination, the vast box-like pile displayed obscure hints of terror which day could not uncover; yet I did not hesitate, since I had come with fierce resolution to test an idea. I believed that the thunder called the d**h-daemon out of some fearsome secret place; and be that daemon solid entity or vaporous pestilence, I meant to see it. I had thoroughly searched the ruin before, hence knew my plan well; choosing as the seat of my vigil the old room of Jan Martense, whose murder looms so great in the rural legends. I felt subtly that the apartment of this ancient victim was best for my purposes. The chamber, measuring about twenty feet square, contained like the other rooms some rubbish which had once been furniture. It lay on the second story, on the southeast corner of the house, and had an immense east window and narrow south window, both devoid of panes or shutters. Opposite the large window was an enormous Dutch fireplace with scriptural tiles representing the prodigal son, and opposite the narrow window was a spacious bed built into the wall. As the tree-muffled thunder grew louder, I arranged my plan's details. First I fastened side by side to the ledge of the large window three rope ladders which I had brought with me. I knew they reached a suitable spot on the gra** outside, for I had tested them. Then the three of us dragged from another room a wide four-poster bedstead, crowding it laterally against the window. Having strown it with fir boughs, all now rested on it with drawn automatics, two relaxing while the third watched. From whatever direction the daemon might come, our potential escape was provided. If it came from within the house, we had the window ladders; if from outside, the door and the stairs. We did not think, judging from precedent, that it would pursue us far even at worst. I watched from midnight to one o'clock, when in spite of the sinister house, the unprotected window, and the approaching thunder and lightning, I felt singularly drowsy. I was between my two companions, George Bennett being toward the window and William Tobey toward the fireplace. Bennett was asleep, having apparently felt the same anomalous drowsiness which affected me, so I designated Tobey for the next watch although even he was nodding. It is curious how intently I had been watching that fireplace. The increasing thunder must have affected my dreams, for in the brief time I slept there came to me apocalyptic visions. Once I partly awaked, probably because the sleeper toward the window had restlessly flung an arm across my chest. I was not sufficiently awake to see whether Tobey was attending to his duties as sentinel, but felt a distinct anxiety on that score. Never before had the presence of evil so poignantly oppressed me. Later I must have dropped asleep again, for it was out of a phantasmal chaos that my mind leaped when the night grew hideous with shrieks beyond anything in my former experience or imagination. In that shrieking the inmost soul of human fear and agony clawed hopelessly and insanely at the ebony gates of oblivion. I awoke to red madness and the mockery of diabolism, as farther and farther down inconceivable vistas that phobic and crystalline anguish retreated and reverberated. There was no light, but I knew from the empty space at my right that Tobey was gone, God alone knew whither. Across my chest still lay the heavy arm of the sleeper at my left. Then came the devastating stroke of lightning which shook the whole mountain, lit the darkest crypts of the hoary grove, and splintered the patriarch of the twisted trees. In the daemon flash of a monstrous fireball the sleeper started up suddenly while the glare from beyond the window threw his shadow vividly upon the chimney above the fireplace from which my eyes had never strayed. That I am still alive and sane, is a marvel I cannot fathom. I cannot fathom it, for the shadow on that chimney was not that of George Bennett or of any other human creature, but a blasphemous abnormality from hell's nethermost craters; a nameless, shapeless abomination which no mind could fully grasp and no pen even partly describe. In another second I was alone in the accursed mansion, shivering and gibbering. George Bennett and William Tobey had left no trace, not even of a struggle. They were never heard of again.